The Great Wall of China is one of the greatest sights in the world — the longest wall in the world, an awe-inspiring feat of ancient defensive architecture. Its winding path over rugged country and steep mountains takes in some great scenery. The Great Wall was not just a wall. It was an integrated military defensive system with watchtowers for surveillance, fortresses for command posts and logistics, beacon towers for communications.

The Great Wall of China is the must-visit China attraction. Perhaps the most powerful advertising words in history come from the poetic pen of Chairman Mao: "Until you reach the Great Wall, you're no hero." Figuratively this has come to mean 'to get over difficulties before reaching a goal'.